Here , in AccuWeb, Inc., Raymond Buisker, v.  Foley & Lardner, Harry C. Engstrom, Quarles & Brady LLP and Nicholas Seay, we find one of the rare state court patent legal malpractice cases.  Generally, as patent law is a federal question, one of the parties either brings the action in Federal District Court or removes it there.  Here is the decision on a motion for summary judgment:

"This case centers on whether AccuWeb, at the summary judgment stage, put forth sufficient evidence to raise a genuine issue of material fact on the question of whether the alleged failure of the Respondents to prevent the premature expiration of AccuWeb’s 5,072,414 patent (the 414 patent) was a substantial factor in causing AccuWeb actionable damages, thus preventing summary judgment. The second issue is whether AccuWeb presented sufficient evidence to allow a fair and reasonable estimate of the amount of such damages, so that there was a genuine issue of material fact, thus preventing summary judgment as to the amount of those damages. We address the second issue because it was addressed by the circuit court. This case involves the interpretation and application of Wis. Stat. § 802.08 (2003-04),[2] the Wisconsin summary judgment statute. "